Hi, could you say me, if are answers for my homework right? I am from Slovakia (European country), I study on gymnasium (1st class). The teacher gave us voluntary homework (for good mark which is 1 here). These homework answers was on school-leaving exam this year. Teacher tried to select easy questions and they were easy for me, but I wanna know if is process of calculating (and my thingking ).. So here it is (I will try to translate it as best as I can)

1. Find the lowest 5 digit number (A432B) which is divisible (possible to divide) by 15 WITHOUT REMAINDER.

I think it's 14325 cause this number is the lowest and possible to divide by 15 - it's possible to divide by 3 and 5 together. Number is possible to divide by 3 when digit sum of number is possible to divide by 3 (1+4+3+2+5=15/3=5)

Number is possible to divide by 5 when it ends on 0 or 5 (14325; when I insert 0, digit sum will be not possible to divide by 3)

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